426 LXVII, UMBELLIFERE. [Sium 
opposite sessile membranous patent leaflets ranging up to 22 in. 
long by 4 in. broad; stem-leaves similar, with common petiole 
fistular rather short dilated and sheathing, and leaflets linear or 
nearly so, obtuse subacute or more or less apiculate, denticulate 
or repand, rather rigid, ranging up to 32 in. long by 3 in. broad, 
erect-patent, sessile ; teeth cartilaginous on the margin, sometimes 
quite acute, in other cases rather obtuse, mostly adpressed and 
thus making the margin of the leaflet look crenulate; the 
cartilaginous margin turning a pretty red in the living state, but 
at length turning pale in the dry state, always tumid; umbels 
axillary and terminal, 13 to 2 in. in diameter; peduncle 2 to 24 
in. long, furrowed; leaves of the involucre numerous, linear, 
entire, $ to 2 in. long; rays of the umbel numerous ranging up 
to nearly an inch; leaves of the involucels several, \lanceolate, 
nearly equalling the short rays of the involucre ; flowers from 
greenish to yellowish ; young fruit purplish or somewhat brown. 
Bumso.—At the banks of streams in the primitive forest near 
Bumbo, in company with Ranunculus pinnatus Poir. (Welw. Herb. 
No. 1209) and a species of Salix; Oct. 1859. A young plant, with 
foliage only and without inflorescence, apparently this species. No. 2510. 
Houriia.—At the banks of streams and in flooded places in the valley 
of Lopollo, from Humpata towards Jau, abundant ; fl. and young fr. 
Jan. 1860, No. 2511. 
Apparently nearly related to the last species, but the fruits seen are 
too young to enable its affinity to be definitely assigned. 
7. PIMPINELLA Riv., L.; Benth. & Hook. f. Gen, PL i. p. 893. 
1. P. huillensis Welw. ex Engl. Hochgebirgsfl. p. 319 (1892). 
Hutiia.—Stems quite glabrous; fruits densely muriculate. In 
rocky pastures among short bushes near Humpata, in company with 
Franchetella arborescens O. Kuntze, var. stenophylla (Welw. Herb. 
No. 2508) ; fl. and fr. 23 April 1860. No. 2502. Slender, perennial, 
tuberous ; radical leaves rosulate, oblong; fr. May 1860. Co.L. 
Carp. 626. 
Var. elatior Welw. ms. in Herb. 
P. Welwitschit Engl., Lc. 
A taller plant than the type; stem-leaves occasionally trifoliolate. 
Huitia.—Flowers white. In rather open, sandy forests composed 
ef Panda-trees, between Eme and the lake of Ivantdla; fl. Jan. and 
end of Feb. 1860. Nos. 2503 and 25030. 
2. P. platyphylla Welw. ms. in Herb. 
An erect perennial remarkably aromatic herb; root thick, 
fusiform, with a very strong rank odour; stem terete, firm, 
subglabrous, finely sulcate-striate, pithy, usually branched in the 
upper part, about 3 to 5 ft. high; radical leaves reniform or 
orbicular-cordiform, glaucous, rigidly coriaceous, more or less 
rosulate, simple, dilated towards the apex, very obtuse, 2 to 5 in. 
in diameter or more, broadly and sharply denticulate or repand on 
the margin, puberulous, petiolate, quickly breaking up after the 
spring rains; stem-leaves oval, deeply cordate at the base, smaller ; 
